<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="../js/vue.js"></script>
</head>
<body>
    <div id="app">
        <cpn>
            <span slot="center">标题</span>
            <button slot="left">返回</button>
        </cpn>
    </div>

    <template id="cpn">
        <div>
            <slot name="left"><span>左边</span></slot>
            <slot name="center"><span>中间</span></slot>
            <slot name="right"><span>右边</span></slot>
        </div>
    </template>
</body>
<script>
    const app = new Vue({
        el:"#app",
        components:{
            cpn:{
                template:"#cpn",
            }
        }
    });
</script>
</html>